﻿/*******************************************************************************
 * Copyright © 2016 WaterCloud.Framework 版权所有
 * Author: WaterCloud
 * Description: WaterCloud快速开发平台
 * Website：
*********************************************************************************/

using System.Collections;
using System.Collections.Generic;
using System.Linq;

namespace WaterCloud.Code
{
	public static partial class Extensions
	{
		/// <summary>
		/// 获取表里某页的数据
		/// </summary>
		/// <param name="data">表数据</param>
		/// <param name="pageIndex">当前页</param>
		/// <param name="pageSize">分页大小</param>
		/// <param name="allPage">返回总页数</param>
		/// <returns>返回当页表数据</returns>
		public static List<T> GetPage<T>(this List<T> data, int pageIndex, int pageSize, out int allPage)
		{
			allPage = 1;
			return null;
		}

		/// <summary>
		/// IList转成List<T>
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <param name="list"></param>
		/// <returns></returns>
		public static List<T> IListToList<T>(IList list)
		{
			T[] array = new T[list.Count];
			list.CopyTo(array, 0);
			return new List<T>(array);
		}

		/// <summary>
		/// 去除空元素
		/// </summary>
		public static List<string> removeNull(List<string> oldList)
		{
			// 临时集合
			List<string> listTemp = new List<string>();
			foreach (var item in oldList)
			{
				if (!string.IsNullOrEmpty(item))
				{
					listTemp.Add(item);
				}
			}
			return listTemp;
		}
	}

	public class ExtList<T> : IEqualityComparer<T> where T : class, new()
	{
		private string[] comparintFiledName = { };

		public ExtList()
		{ }

		public ExtList(params string[] comparintFiledName)
		{
			this.comparintFiledName = comparintFiledName;
		}

		bool IEqualityComparer<T>.Equals(T x, T y)
		{
			if (x == null && y == null)
			{
				return false;
			}
			if (comparintFiledName.Length == 0)
			{
				return x.Equals(y);
			}
			bool result = true;
			var typeX = x.GetType();//获取类型
			var typeY = y.GetType();
			foreach (var filedName in comparintFiledName)
			{
				var xPropertyInfo = (from p in typeX.GetProperties() where p.Name.Equals(filedName) select p).FirstOrDefault();
				var yPropertyInfo = (from p in typeY.GetProperties() where p.Name.Equals(filedName) select p).FirstOrDefault();

				result = result
					&& xPropertyInfo != null && yPropertyInfo != null
					&& xPropertyInfo.GetValue(x, null).ToString().Equals(yPropertyInfo.GetValue(y, null));
			}
			return result;
		}

		int IEqualityComparer<T>.GetHashCode(T obj)
		{
			return obj.ToString().GetHashCode();
		}
	}
}